CONTENTS 



Page 

 Proceedings of the Thirty-third Annual Meeting of the Geological Society 

 of America, held at Chicago, Illinois, December 28-30, 1920; Edmund 



Otis Hovey, Secretary " 1 



Session of Tuesday, December 28 5 



Report of the Council 6 



Secretary's report 6 



Treasurer's report 9 



Editor's report 11 



Election of Auditing Committee 12 



Amendments to Constitution and By-Laws 13 



• Election of officers for 1921 13 



Election of representatives on National Research Council 14 



Election of Fellows 14 



Changes in Publication Rules 16 



Support of the Geological Magazine 16 



Necrology 16 



Memorial of Joaquim Candido da Costa Sena (with bibliography) ; 



by John C. Bkanner 16 



Titles and abstracts of papers presented at the morning session 



and discussions thereon IS 



General statement on the work of the Committee on Sedi- 

 mentation, Division of Geology and Geography, National 

 Research Council [abstract]; by T. Wayi.and Vaughan.. 19 

 Studies of sedimentation in the universities of the eastern 



part of the United States [abstract] ; by E. S. Moore 19 



Studies of sedimentation in the universities of the central 



part of the United States [abstract] ; by W. H. Twenhofel 20 

 Studies of sedimentation in the universities of the western 



part of the United States [abstract] ; by G. D. Louderback. 20 

 Some problems of sedimentation studies suggested \>j State 



geologists [abstract] ; by J. A. Udden 20 



Chronology in geology [discussion] ; by J. A. Udden 21 



Chemical and physical researches on sedimentation [ab- 

 stract] ; by Roger C. Wells 23 



Field description of sediments [abstract] ; by M. I. Goldman 24 

 Preparation of a treatise on sedimentation [abstract] ; by 



W. H. Twenhofel 24 



Canadian studies in sedimentation [title] ; by E. M. Kindle. . 25 

 Association of glauconite with unconformities [abstract] ; bj' 



Marcus I. Goldman 25 



Titles and abstracts of papers presented before the afternoon ses- 

 sion and discussions thereon 26 



Syngenetic origin of concretions in shale [abstract and dis- 

 cussion] ; by W. A. Tarr 26 



(ill) 



